./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn4f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ifeqn4f.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7849780e572f4b715fd4a0599e2552ba9e578b3aff0bf5f111ebb8575b54953d --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 19:00:46,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 19:00:46,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 19:00:46,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 19:00:46,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 19:00:46,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 19:00:46,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 19:00:46,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 19:00:46,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 19:00:46,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 19:00:46,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 19:00:46,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 19:00:46,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 19:00:46,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 19:00:46,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 19:00:46,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 19:00:46,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 19:00:46,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 19:00:46,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 19:00:46,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 19:00:46,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 19:00:46,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 19:00:46,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 19:00:46,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 19:00:46,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 19:00:46,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 19:00:46,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 19:00:46,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 19:00:46,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 19:00:46,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 19:00:46,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 19:00:46,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 19:00:46,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 19:00:46,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 19:00:46,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 19:00:46,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 19:00:46,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 19:00:46,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 19:00:46,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 19:00:46,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 19:00:46,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 19:00:46,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 19:00:46,283 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 19:00:46,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 19:00:46,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 19:00:46,284 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 19:00:46,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 19:00:46,285 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 19:00:46,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 19:00:46,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 19:00:46,285 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 19:00:46,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 19:00:46,286 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 19:00:46,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 19:00:46,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 19:00:46,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 19:00:46,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 19:00:46,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 19:00:46,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 19:00:46,287 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 19:00:46,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 19:00:46,287 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 19:00:46,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 19:00:46,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 19:00:46,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 19:00:46,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 19:00:46,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:00:46,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 19:00:46,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 19:00:46,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 19:00:46,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 19:00:46,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 19:00:46,289 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 19:00:46,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 19:00:46,289 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 19:00:46,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 19:00:46,290 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 19:00:46,290 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7849780e572f4b715fd4a0599e2552ba9e578b3aff0bf5f111ebb8575b54953d [2023-02-15 19:00:46,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 19:00:46,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 19:00:46,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 19:00:46,520 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 19:00:46,520 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 19:00:46,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn4f.c [2023-02-15 19:00:47,616 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 19:00:47,802 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 19:00:47,802 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn4f.c [2023-02-15 19:00:47,808 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304771a50/a8468d4993c442eb9cebca14068b8a80/FLAG28c9348a2 [2023-02-15 19:00:47,821 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304771a50/a8468d4993c442eb9cebca14068b8a80 [2023-02-15 19:00:47,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 19:00:47,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 19:00:47,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 19:00:47,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 19:00:47,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 19:00:47,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:00:47" (1/1) ... [2023-02-15 19:00:47,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5161cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:47, skipping insertion in model container [2023-02-15 19:00:47,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:00:47" (1/1) ... [2023-02-15 19:00:47,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 19:00:47,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 19:00:47,956 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] [2023-02-15 19:00:47,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:00:47,981 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 19:00:47,990 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] [2023-02-15 19:00:48,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:00:48,014 INFO L208 MainTranslator]: Completed translation [2023-02-15 19:00:48,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48 WrapperNode [2023-02-15 19:00:48,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 19:00:48,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 19:00:48,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 19:00:48,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 19:00:48,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48" (1/1) ... [2023-02-15 19:00:48,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48" (1/1) ... [2023-02-15 19:00:48,047 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-02-15 19:00:48,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 19:00:48,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 19:00:48,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 19:00:48,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 19:00:48,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48" (1/1) ... [2023-02-15 19:00:48,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48" (1/1) ... [2023-02-15 19:00:48,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48" (1/1) ... [2023-02-15 19:00:48,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48" (1/1) ... [2023-02-15 19:00:48,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48" (1/1) ... [2023-02-15 19:00:48,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48" (1/1) ... [2023-02-15 19:00:48,077 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48" (1/1) ... [2023-02-15 19:00:48,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48" (1/1) ... [2023-02-15 19:00:48,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 19:00:48,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 19:00:48,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 19:00:48,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 19:00:48,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48" (1/1) ... [2023-02-15 19:00:48,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:00:48,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:00:48,114 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 19:00:48,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 19:00:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 19:00:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 19:00:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 19:00:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 19:00:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 19:00:48,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 19:00:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 19:00:48,204 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 19:00:48,205 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 19:00:48,376 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 19:00:48,379 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 19:00:48,380 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 19:00:48,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:00:48 BoogieIcfgContainer [2023-02-15 19:00:48,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 19:00:48,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 19:00:48,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 19:00:48,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 19:00:48,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 07:00:47" (1/3) ... [2023-02-15 19:00:48,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab841ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:00:48, skipping insertion in model container [2023-02-15 19:00:48,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:00:48" (2/3) ... [2023-02-15 19:00:48,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab841ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:00:48, skipping insertion in model container [2023-02-15 19:00:48,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:00:48" (3/3) ... [2023-02-15 19:00:48,386 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2023-02-15 19:00:48,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 19:00:48,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 19:00:48,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 19:00:48,457 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d39ab50, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 19:00:48,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 19:00:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 19:00:48,464 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:00:48,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:00:48,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:00:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:00:48,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2023-02-15 19:00:48,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:00:48,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047563137] [2023-02-15 19:00:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:48,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:00:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:00:48,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:00:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047563137] [2023-02-15 19:00:48,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 19:00:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038654446] [2023-02-15 19:00:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:48,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:00:48,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:00:48,602 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:00:48,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 19:00:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:00:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 19:00:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:00:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:00:48,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:00:48,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038654446] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:00:48,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:00:48,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 19:00:48,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691104460] [2023-02-15 19:00:48,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:00:48,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 19:00:48,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:00:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 19:00:48,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 19:00:48,726 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:48,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:00:48,740 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2023-02-15 19:00:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 19:00:48,742 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 19:00:48,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:00:48,747 INFO L225 Difference]: With dead ends: 42 [2023-02-15 19:00:48,747 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 19:00:48,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 19:00:48,751 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:00:48,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:00:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 19:00:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-15 19:00:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-15 19:00:48,776 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-02-15 19:00:48,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:00:48,776 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-15 19:00:48,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:48,777 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-15 19:00:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 19:00:48,777 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:00:48,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:00:48,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 19:00:48,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 19:00:48,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:00:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:00:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2023-02-15 19:00:48,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:00:48,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117158972] [2023-02-15 19:00:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:48,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:00:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:00:49,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:00:49,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117158972] [2023-02-15 19:00:49,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 19:00:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828166664] [2023-02-15 19:00:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:49,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:00:49,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:00:49,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:00:49,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 19:00:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:00:49,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 19:00:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:00:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:00:49,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:00:49,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828166664] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:00:49,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:00:49,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 19:00:49,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128995958] [2023-02-15 19:00:49,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:00:49,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:00:49,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:00:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:00:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:00:49,171 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:49,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:00:49,217 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-15 19:00:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:00:49,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 19:00:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:00:49,224 INFO L225 Difference]: With dead ends: 42 [2023-02-15 19:00:49,224 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 19:00:49,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:00:49,225 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:00:49,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:00:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 19:00:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2023-02-15 19:00:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-15 19:00:49,235 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-02-15 19:00:49,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:00:49,236 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-15 19:00:49,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:49,236 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-15 19:00:49,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 19:00:49,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:00:49,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:00:49,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 19:00:49,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 19:00:49,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:00:49,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:00:49,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2023-02-15 19:00:49,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:00:49,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819356961] [2023-02-15 19:00:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:49,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:00:49,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:00:49,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245017387] [2023-02-15 19:00:49,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:49,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:00:49,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:00:49,517 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:00:49,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 19:00:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:00:49,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 19:00:49,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:00:49,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 19:00:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 19:00:49,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:00:49,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:00:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819356961] [2023-02-15 19:00:49,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:00:49,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245017387] [2023-02-15 19:00:49,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245017387] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:00:49,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:00:49,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 19:00:49,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108153187] [2023-02-15 19:00:49,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:00:49,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:00:49,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:00:49,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:00:49,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:00:49,728 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:00:49,809 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-02-15 19:00:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 19:00:49,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-15 19:00:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:00:49,811 INFO L225 Difference]: With dead ends: 39 [2023-02-15 19:00:49,812 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 19:00:49,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:00:49,815 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:00:49,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 61 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:00:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 19:00:49,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2023-02-15 19:00:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-15 19:00:49,821 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 18 [2023-02-15 19:00:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:00:49,821 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-15 19:00:49,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-15 19:00:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 19:00:49,822 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:00:49,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:00:49,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 19:00:50,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:00:50,028 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:00:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:00:50,028 INFO L85 PathProgramCache]: Analyzing trace with hash -217194585, now seen corresponding path program 1 times [2023-02-15 19:00:50,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:00:50,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856593351] [2023-02-15 19:00:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:50,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:00:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:00:50,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:00:50,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856593351] [2023-02-15 19:00:50,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 19:00:50,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908122115] [2023-02-15 19:00:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:50,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:00:50,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:00:50,065 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:00:50,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 19:00:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:00:50,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 19:00:50,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:00:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 19:00:50,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:00:50,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908122115] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:00:50,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:00:50,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 19:00:50,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886758123] [2023-02-15 19:00:50,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:00:50,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 19:00:50,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:00:50,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 19:00:50,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:00:50,123 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:00:50,143 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2023-02-15 19:00:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 19:00:50,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-15 19:00:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:00:50,144 INFO L225 Difference]: With dead ends: 50 [2023-02-15 19:00:50,145 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 19:00:50,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:00:50,145 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:00:50,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:00:50,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 19:00:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2023-02-15 19:00:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-15 19:00:50,149 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2023-02-15 19:00:50,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:00:50,149 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-15 19:00:50,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-15 19:00:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 19:00:50,150 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:00:50,150 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:00:50,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 19:00:50,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:00:50,355 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:00:50,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:00:50,355 INFO L85 PathProgramCache]: Analyzing trace with hash -748772581, now seen corresponding path program 1 times [2023-02-15 19:00:50,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:00:50,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046844290] [2023-02-15 19:00:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:50,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:00:50,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:00:50,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573095065] [2023-02-15 19:00:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:50,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:00:50,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:00:50,368 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:00:50,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 19:00:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:00:50,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 19:00:50,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:00:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 19:00:50,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:00:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 19:00:50,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:00:50,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046844290] [2023-02-15 19:00:50,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 19:00:50,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573095065] [2023-02-15 19:00:50,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573095065] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:00:50,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:00:50,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 19:00:50,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229214900] [2023-02-15 19:00:50,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:00:50,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 19:00:50,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:00:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 19:00:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:00:50,505 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:00:50,591 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2023-02-15 19:00:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 19:00:50,592 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-15 19:00:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:00:50,594 INFO L225 Difference]: With dead ends: 65 [2023-02-15 19:00:50,594 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 19:00:50,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:00:50,595 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:00:50,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 38 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:00:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 19:00:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2023-02-15 19:00:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-02-15 19:00:50,602 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2023-02-15 19:00:50,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:00:50,603 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-02-15 19:00:50,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-02-15 19:00:50,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 19:00:50,604 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:00:50,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:00:50,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 19:00:50,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:00:50,809 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:00:50,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:00:50,809 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2023-02-15 19:00:50,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:00:50,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215872116] [2023-02-15 19:00:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:50,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:00:50,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:00:50,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676738758] [2023-02-15 19:00:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:50,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:00:50,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:00:50,864 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:00:50,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 19:00:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 19:00:50,943 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 19:00:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 19:00:50,971 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 19:00:50,971 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-15 19:00:50,972 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 19:00:50,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 19:00:51,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:00:51,175 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-02-15 19:00:51,178 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 19:00:51,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 07:00:51 BoogieIcfgContainer [2023-02-15 19:00:51,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 19:00:51,200 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 19:00:51,200 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 19:00:51,201 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 19:00:51,201 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:00:48" (3/4) ... [2023-02-15 19:00:51,202 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-15 19:00:51,230 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 19:00:51,230 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 19:00:51,231 INFO L158 Benchmark]: Toolchain (without parser) took 3406.82ms. Allocated memory was 138.4MB in the beginning and 192.9MB in the end (delta: 54.5MB). Free memory was 105.3MB in the beginning and 148.7MB in the end (delta: -43.3MB). Peak memory consumption was 12.2MB. Max. memory is 16.1GB. [2023-02-15 19:00:51,231 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory is still 57.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 19:00:51,231 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.59ms. Allocated memory is still 138.4MB. Free memory was 104.7MB in the beginning and 94.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 19:00:51,231 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.97ms. Allocated memory is still 138.4MB. Free memory was 94.3MB in the beginning and 92.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 19:00:51,231 INFO L158 Benchmark]: Boogie Preprocessor took 30.57ms. Allocated memory is still 138.4MB. Free memory was 92.9MB in the beginning and 91.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 19:00:51,232 INFO L158 Benchmark]: RCFGBuilder took 300.96ms. Allocated memory is still 138.4MB. Free memory was 91.5MB in the beginning and 79.6MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-15 19:00:51,232 INFO L158 Benchmark]: TraceAbstraction took 2817.77ms. Allocated memory was 138.4MB in the beginning and 192.9MB in the end (delta: 54.5MB). Free memory was 79.0MB in the beginning and 150.8MB in the end (delta: -71.8MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 19:00:51,232 INFO L158 Benchmark]: Witness Printer took 29.88ms. Allocated memory is still 192.9MB. Free memory was 150.8MB in the beginning and 148.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 19:00:51,233 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory is still 57.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.59ms. Allocated memory is still 138.4MB. Free memory was 104.7MB in the beginning and 94.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.97ms. Allocated memory is still 138.4MB. Free memory was 94.3MB in the beginning and 92.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.57ms. Allocated memory is still 138.4MB. Free memory was 92.9MB in the beginning and 91.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 300.96ms. Allocated memory is still 138.4MB. Free memory was 91.5MB in the beginning and 79.6MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2817.77ms. Allocated memory was 138.4MB in the beginning and 192.9MB in the end (delta: 54.5MB). Free memory was 79.0MB in the beginning and 150.8MB in the end (delta: -71.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 29.88ms. Allocated memory is still 192.9MB. Free memory was 150.8MB in the beginning and 148.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [a={-2:0}, b={-1:0}, i=0, N=2] [L31] COND TRUE i